Knowing that line segment ab is the same length as line segment cd is enough to prove that triangles abd and bcd are congruent. true false

Assuming this is a general question and there is not an image missing that would contribute to the problem:

This is false. You need to know more than just the fact that two sides are congruent to prove that two triangles are congruent. The two other sides of BCD could be longer or shorter than those of ABD.

The answer is b: there are many languages spoken in the caribbean because of the many nations who colonized the region.